crypto/asn1/tasn_prn.c

   1 /* tasn_prn.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000,2005 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59
  60 #include <stddef.h>
  61 #include "cryptlib.h"
  62 #include <openssl/asn1.h>
  63 #include <openssl/asn1t.h>
  64 #include <openssl/objects.h>
  65 #include <openssl/buffer.h>
  66 #include <openssl/err.h>
  67 #include <openssl/x509v3.h>
  68 #include "asn1_locl.h"
  69
  70 /* Print routines.
  71  */
  72
  73 /* ASN1_PCTX routines */
  74
  75 ASN1_PCTX default_pctx =
  76         {
  77         ASN1_PCTX_FLAGS_SHOW_ABSENT,    /* flags */
  78         0,      /* nm_flags */
  79         0,      /* cert_flags */
  80         0,      /* oid_flags */
  81         0       /* str_flags */
  82         };
  83
  84
  85 ASN1_PCTX *ASN1_PCTX_new(void)
  86         {
  87         ASN1_PCTX *ret;
  88         ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
  89         if (ret == NULL)
  90                 {
  91                 ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
  92                 return NULL;
  93                 }
  94         ret->flags = 0;
  95         ret->nm_flags = 0;
  96         ret->cert_flags = 0;
  97         ret->oid_flags = 0;
  98         ret->str_flags = 0;
  99         return ret;
 100         }
 101
 102 void ASN1_PCTX_free(ASN1_PCTX *p)
 103         {
 104         OPENSSL_free(p);
 105         }
 106
 107 unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
 108         {
 109         return p->flags;
 110         }
 111
 112 void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
 113         {
 114         p->flags = flags;
 115         }
 116
 117 unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
 118         {
 119         return p->nm_flags;
 120         }
 121
 122 void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
 123         {
 124         p->nm_flags = flags;
 125         }
 126
 127 unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
 128         {
 129         return p->cert_flags;
 130         }
 131
 132 void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
 133         {
 134         p->cert_flags = flags;
 135         }
 136
 137 unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
 138         {
 139         return p->oid_flags;
 140         }
 141
 142 void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
 143         {
 144         p->oid_flags = flags;
 145         }
 146
 147 unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
 148         {
 149         return p->str_flags;
 150         }
 151
 152 void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
 153         {
 154         p->str_flags = flags;
 155         }
 156
 157 /* Main print routines */
 158
 159 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 160                                 const ASN1_ITEM *it,
 161                                 const char *fname, const char *sname,
 162                                 int nohdr, const ASN1_PCTX *pctx);
 163
 164 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 165                                 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
 166
 167 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
 168                                 const ASN1_ITEM *it, int indent,
 169                                 const char *fname, const char *sname,
 170                                 const ASN1_PCTX *pctx);
 171
 172 static int asn1_print_fsname(BIO *out, int indent,
 173                         const char *fname, const char *sname,
 174                         const ASN1_PCTX *pctx);
 175
 176 int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
 177                                 const ASN1_ITEM *it, const ASN1_PCTX *pctx)
 178         {
 179         const char *sname;
 180         if (pctx == NULL)
 181                 pctx = &default_pctx;
 182         if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 183                 sname = NULL;
 184         else
 185                 sname = it->sname;
 186         return asn1_item_print_ctx(out, &ifld, indent, it,
 187                                                         NULL, sname, 0, pctx);
 188         }
 189
 190 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 191                                 const ASN1_ITEM *it,
 192                                 const char *fname, const char *sname,
 193                                 int nohdr, const ASN1_PCTX *pctx)
 194         {
 195         const ASN1_TEMPLATE *tt;
 196         const ASN1_EXTERN_FUNCS *ef;
 197         ASN1_VALUE **tmpfld;
 198         const ASN1_AUX *aux = it->funcs;
 199         ASN1_aux_cb *asn1_cb;
 200         ASN1_PRINT_ARG parg;
 201         int i;
 202         if (aux && aux->asn1_cb)
 203                 {
 204                 parg.out = out;
 205                 parg.indent = indent;
 206                 parg.pctx = pctx;
 207                 asn1_cb = aux->asn1_cb;
 208                 }
 209         else asn1_cb = 0;
 210
 211         if(*fld == NULL)
 212                 {
 213                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT)
 214                         {
 215                         if (!nohdr && !asn1_print_fsname(out, indent,
 216                                                         fname, sname, pctx))
 217                                 return 0;
 218                         if (BIO_puts(out, "<ABSENT>\n") <= 0)
 219                                 return 0;
 220                         }
 221                 return 1;
 222                 }
 223
 224         switch(it->itype)
 225                 {
 226                 case ASN1_ITYPE_PRIMITIVE:
 227                 if(it->templates)
 228                         {
 229                         if (!asn1_template_print_ctx(out, fld, indent,
 230                                                         it->templates, pctx))
 231                                 return 0;
 232                         }
 233                 /* fall thru */
 234                 case ASN1_ITYPE_MSTRING:
 235                 if (!asn1_primitive_print(out, fld, it,
 236                                 indent, fname, sname,pctx))
 237                         return 0;
 238                 break;
 239
 240                 case ASN1_ITYPE_EXTERN:
 241                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 242                         return 0;
 243                 /* Use new style print routine if possible */
 244                 ef = it->funcs;
 245                 if (ef && ef->asn1_ex_print)
 246                         {
 247                         i = ef->asn1_ex_print(out, fld, indent, "", pctx);
 248                         if (!i)
 249                                 return 0;
 250                         if ((i == 2) && (BIO_puts(out, "\n") <= 0))
 251                                 return 0;
 252                         return 1;
 253                         }
 254                 else if (sname &&
 255                         BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
 256                         return 0;
 257                 break;
 258
 259                 case ASN1_ITYPE_CHOICE:
 260 #if 0
 261                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 262                         return 0;
 263 #endif
 264                 /* CHOICE type, get selector */
 265                 i = asn1_get_choice_selector(fld, it);
 266                 /* This should never happen... */
 267                 if((i < 0) || (i >= it->tcount))
 268                         {
 269                         if (BIO_printf(out,
 270                                 "ERROR: selector [%d] invalid\n", i) <= 0)
 271                                 return 0;
 272                         return 1;
 273                         }
 274                 tt = it->templates + i;
 275                 tmpfld = asn1_get_field_ptr(fld, tt);
 276                 if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
 277                         return 0;
 278                 break;
 279
 280                 case ASN1_ITYPE_SEQUENCE:
 281                 case ASN1_ITYPE_NDEF_SEQUENCE:
 282                 if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
 283                         return 0;
 284                 if (fname || sname)
 285                         {
 286                         if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 287                                 {
 288                                 if (BIO_puts(out, " {\n") <= 0)
 289                                         return 0;
 290                                 }
 291                         else
 292                                 {
 293                                 if (BIO_puts(out, "\n") <= 0)
 294                                         return 0;
 295                                 }
 296                         }
 297
 298                 if (asn1_cb)
 299                         {
 300                         i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
 301                         if (i == 0)
 302                                 return 0;
 303                         if (i == 2)
 304                                 return 1;
 305                         }
 306
 307                 /* Print each field entry */
 308                 for(i = 0, tt = it->templates; i < it->tcount; i++, tt++)
 309                         {
 310                         const ASN1_TEMPLATE *seqtt;
 311                         seqtt = asn1_do_adb(fld, tt, 1);
 312                         tmpfld = asn1_get_field_ptr(fld, seqtt);
 313                         if (!asn1_template_print_ctx(out, tmpfld,
 314                                                 indent + 2, seqtt, pctx))
 315                                 return 0;
 316                         }
 317                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 318                         {
 319                         if (BIO_printf(out, "%*s}\n", indent, "") < 0)
 320                                 return 0;
 321                         }
 322
 323                 if (asn1_cb)
 324                         {
 325                         i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
 326                         if (i == 0)
 327                                 return 0;
 328                         }
 329                 break;
 330
 331                 default:
 332                 BIO_printf(out, "Unprocessed type %d\n", it->itype);
 333                 return 0;
 334                 }
 335
 336         return 1;
 337         }
 338
 339 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
 340                                 const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
 341         {
 342         int i, flags;
 343         const char *sname, *fname;
 344         flags = tt->flags;
 345         if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
 346                 sname = ASN1_ITEM_ptr(tt->item)->sname;
 347         else
 348                 sname = NULL;
 349         if(pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 350                 fname = NULL;
 351         else
 352                 fname = tt->field_name;
 353         if(flags & ASN1_TFLG_SK_MASK)
 354                 {
 355                 char *tname;
 356                 ASN1_VALUE *skitem;
 357                 /* SET OF, SEQUENCE OF */
 358                 if (fname)
 359                         {
 360                         if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF)
 361                                 {
 362                                 if(flags & ASN1_TFLG_SET_OF)
 363                                         tname = "SET";
 364                                 else
 365                                         tname = "SEQUENCE";
 366                                 if (BIO_printf(out, "%*s%s OF %s {\n",
 367                                         indent, "", tname, tt->field_name) <= 0)
 368                                         return 0;
 369                                 }
 370                         else if (BIO_printf(out, "%*s%s:\n", indent, "",
 371                                         fname) <= 0)
 372                                 return 0;
 373                         }
 374                 for(i = 0; i < sk_num((STACK *)*fld); i++)
 375                         {
 376                         if ((i > 0) && (BIO_puts(out, "\n") <= 0))
 377                                 return 0;
 378
 379                         skitem = (ASN1_VALUE *)sk_value((STACK *)*fld, i);
 380                         if (!asn1_item_print_ctx(out, &skitem, indent + 2,
 381                                 ASN1_ITEM_ptr(tt->item), NULL, NULL, 1, pctx))
 382                                 return 0;
 383                         }
 384                 if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
 385                                 return 0;
 386                 if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
 387                         {
 388                         if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
 389                                 return 0;
 390                         }
 391                 return 1;
 392                 }
 393         return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
 394                                                         fname, sname, 0, pctx);
 395         }
 396
 397 static int asn1_print_fsname(BIO *out, int indent,
 398                         const char *fname, const char *sname,
 399                         const ASN1_PCTX *pctx)
 400         {
 401         static char spaces[] = "                    ";
 402         const int nspaces = sizeof(spaces) - 1;
 403
 404 #if 0
 405         if (!sname && !fname)
 406                 return 1;
 407 #endif
 408
 409         while (indent > nspaces)
 410                 {
 411                 if (BIO_write(out, spaces, nspaces) != nspaces)
 412                         return 0;
 413                 indent -= nspaces;
 414                 }
 415         if (BIO_write(out, spaces, indent) != indent)
 416                 return 0;
 417         if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
 418                 sname = NULL;
 419         if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
 420                 fname = NULL;
 421         if (!sname && !fname)
 422                 return 1;
 423         if (fname)
 424                 {
 425                 if (BIO_puts(out, fname) <= 0)
 426                         return 0;
 427                 }
 428         if (sname)
 429                 {
 430                 if (fname)
 431                         {
 432                         if (BIO_printf(out, " (%s)", sname) <= 0)
 433                                 return 0;
 434                         }
 435                 else
 436                         {
 437                         if (BIO_puts(out, sname) <= 0)
 438                                 return 0;
 439                         }
 440                 }
 441         if (BIO_write(out, ": ", 2) != 2)
 442                 return 0;
 443         return 1;
 444         }
 445
 446 static int asn1_print_boolean_ctx(BIO *out, const int bool,
 447                                                         const ASN1_PCTX *pctx)
 448         {
 449         const char *str;
 450         switch (bool)
 451                 {
 452                 case -1:
 453                 str = "BOOL ABSENT";
 454                 break;
 455
 456                 case 0:
 457                 str = "FALSE";
 458                 break;
 459
 460                 default:
 461                 str = "TRUE";
 462                 break;
 463
 464                 }
 465
 466         if (BIO_puts(out, str) <= 0)
 467                 return 0;
 468         return 1;
 469
 470         }
 471
 472 static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
 473                                                 const ASN1_PCTX *pctx)
 474         {
 475         char *s;
 476         int ret = 1;
 477         s = i2s_ASN1_INTEGER(NULL, str);
 478         if (BIO_puts(out, s) <= 0)
 479                 ret = 0;
 480         OPENSSL_free(s);
 481         return ret;
 482         }
 483
 484 static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
 485                                                 const ASN1_PCTX *pctx)
 486         {
 487         char objbuf[80];
 488         const char *ln;
 489         ln = OBJ_nid2ln(OBJ_obj2nid(oid));
 490         if(!ln)
 491                 ln = "";
 492         OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
 493         if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
 494                 return 0;
 495         return 1;
 496         }
 497
 498 static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
 499                                                 const ASN1_PCTX *pctx)
 500         {
 501         if (str->type == V_ASN1_BIT_STRING)
 502                 {
 503                 if (BIO_printf(out, " (%ld unused bits)\n",
 504                                         str->flags & 0x7) <= 0)
 505                                 return 0;
 506                 }
 507         else if (BIO_puts(out, "\n") <= 0)
 508                 return 0;
 509         if ((str->length > 0)
 510                 && BIO_dump_indent(out, (char *)str->data, str->length,
 511                                 indent + 2) <= 0)
 512                 return 0;
 513         return 1;
 514         }
 515
 516 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
 517                                 const ASN1_ITEM *it, int indent,
 518                                 const char *fname, const char *sname,
 519                                 const ASN1_PCTX *pctx)
 520         {
 521         long utype;
 522         ASN1_STRING *str;
 523         int ret = 1, needlf = 1;
 524         const char *pname;
 525         if (!asn1_print_fsname(out, indent, fname, sname, pctx))
 526                         return 0;
 527         str = (ASN1_STRING *)*fld;
 528         if (it->itype == ASN1_ITYPE_MSTRING)
 529                 utype = str->type & ~V_ASN1_NEG;
 530         else
 531                 utype = it->utype;
 532         if (utype == V_ASN1_ANY)
 533                 {
 534                 ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
 535                 utype = atype->type;
 536                 fld = &atype->value.asn1_value;
 537                 str = (ASN1_STRING *)*fld;
 538                 if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
 539                         pname = NULL;
 540                 else
 541                         pname = ASN1_tag2str(utype);
 542                 }
 543         else
 544                 {
 545                 if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
 546                         pname = ASN1_tag2str(utype);
 547                 else
 548                         pname = NULL;
 549                 }
 550
 551         if (utype == V_ASN1_NULL)
 552                 {
 553                 if (BIO_puts(out, "NULL\n") <= 0)
 554                         return 0;
 555                 return 1;
 556                 }
 557
 558         if (pname)
 559                 {
 560                 if (BIO_puts(out, pname) <= 0)
 561                         return 0;
 562                 if (BIO_puts(out, ":") <= 0)
 563                         return 0;
 564                 }
 565
 566         switch (utype)
 567                 {
 568                 case V_ASN1_BOOLEAN:
 569                         {
 570                         int bool = *(int *)fld;
 571                         if (bool == -1)
 572                                 bool = it->size;
 573                         ret = asn1_print_boolean_ctx(out, bool, pctx);
 574                         }
 575                 break;
 576
 577                 case V_ASN1_INTEGER:
 578                 case V_ASN1_ENUMERATED:
 579                 ret = asn1_print_integer_ctx(out, str, pctx);
 580                 break;
 581
 582                 case V_ASN1_UTCTIME:
 583                 ret = ASN1_UTCTIME_print(out, str);
 584                 break;
 585
 586                 case V_ASN1_GENERALIZEDTIME:
 587                 ret = ASN1_GENERALIZEDTIME_print(out, str);
 588                 break;
 589
 590                 case V_ASN1_OBJECT:
 591                 ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
 592                 break;
 593
 594                 case V_ASN1_OCTET_STRING:
 595                 case V_ASN1_BIT_STRING:
 596                 ret = asn1_print_obstring_ctx(out, str, indent, pctx);
 597                 needlf = 0;
 598                 break;
 599
 600                 case V_ASN1_SEQUENCE:
 601                 case V_ASN1_SET:
 602                 case V_ASN1_OTHER:
 603                 if (BIO_puts(out, "\n") <= 0)
 604                         return 0;
 605                 if (ASN1_parse_dump(out, str->data, str->length,
 606                                                 indent, 0) <= 0)
 607                         ret = 0;
 608                 needlf = 0;
 609                 break;
 610
 611                 default:
 612                 ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
 613
 614                 }
 615         if (!ret)
 616                 return 0;
 617         if (needlf && BIO_puts(out, "\n") <= 0)
 618                 return 0;
 619         return 1;
 620         }